Whatman 1541-110 Filter Circles, 110mm Dia, Hardened Ashless Grade 541, 100/pk (PN:1541-110)

Grade 541 is designed for fast filtration of coarse particles and gelatinous precipitates, especially in gravimetric analysis involving strong acids or alkaline solutions. It is widely used in analytical chemistry, environmental testing, and industrial quality control.

This filter paper provides approximately 20–25 µm particle retention with a fast flow rate, making it ideal for applications requiring quick filtration without sacrificing reliability.

“Hardened ashless” means the paper has been acid-washed to remove impurities and chemically treated for high wet strength, resulting in very low ash content (≤0.006%) after ignition. This is essential for accurate gravimetric measurements.

Grade 541 is engineered with high chemical resistance and reinforced fiber structure, allowing it to withstand aggressive reagents and vacuum filtration conditions without breaking down.

The 110 mm diameter is ideal for standard laboratory funnels and vacuum filtration setups, providing a balanced filtration area for medium sample volumes while maintaining efficient throughput.